Edward T. Habermann, MD, Lester S. Borden, MD, FACS Anthony K. Hedley, MD, FRCS, David S. Hungerford, MD Kenneth A. Krackow, MD
Abstract: This retrospective study reviewed the results of 3,218 total knee arthroplasty cases using one total knee replacement system at five centers from July 1991 to October 1997....

We present a rare case of fracture-dislocation at the level of the first sacral (S1) and second sacral (S2) vertebrae. The S1 was displaced forward into the pelvic cavity and was located just in front of the S2. Because the patient also had extensive neurological injury to the lumbar plexus and instability...

Patellar dislocations are common, particularly in adolescent females and athletes. Patients usually present with an inability to extend an obviously deformed knee. A sizable effusion may also be seen. This injury may be due to direct trauma to the patella or a valgus stress combined with flexion and external rotation.
The...

PATELLAR DISLOCATIONS:
* Most commonly due to twisting injury to knee.
* Only 10 % caused by direct trauma
* 24% incidence of positive family history of patellar dislocation
* Risk factors include:
  1. Shallow patellofemoral articular groove
  2. Patella alta
  3. Excessive Q angle
  4. Generalized ligamentous laxity
* Average age is 16- 20...

Isolated fracture of the lateral condyle of the femur or Hoffa fracture is a rare lesion and has been reported to occur with supracondylar fracture of the femur, fracture of the femoral shaft and knee dislocation. We report a rare case of ipsilateral Hoffa fracture and patellar dislocation, which has...

* most common in young girls
o (genu valgum, patella alta, quad mm deficiency more in girls)
* LATERAL dislocation
* spontaneous reduction
* recurrent dislocation
* fracture associated in 5-10%
* MRI: bone bruise of lateral femur and medial patella

- patient characteristics:
- patellar subluxation or dislocation may occur during childhood but is more frequently seen in adolescence;
- in some cases, dislocation occurs in knees w/ patellofemoral dysplasia,...

Patellar Malalignment / Instability
Conditions
1. Acute Patella dislocation
2. Recurrent Patellar dislocation/ subluxation
3. Anterior Knee Pain

Soft tissue injuries of the knee are some of the most common and clinically challenging musculoskeletal disorders in patients presenting to the ED. Therefore, establishing clear-cut diagnostic and therapeutic objectives for these injuries is important. Knee pain and related symptoms may derive from damage to 1 or more of the soft...

Nail-patella syndrome (NPS; OMIM 161200) is a well-known autosomal dominant condition characterized by nail dysplasia, patellar aplasia-hypoplasia, arthrodysplasia of the elbows, iliac horns, and nephropathy. Recent reports indicate that open-angle glaucoma (OAG) may also cosegregate with NPS. One of the first chromosomal linkages identified in humans is between the NPS...

Wheeless' Textbook of Orthopaedics. Links to a complete list of fractures.
Acetabular Fracture Ankle Fractures Barton's Fracture: ...

- Anatomy
- Biomechanics
- Multipartite Patella
- Chondromalacia
- Dislocation of the Patella
- Examination of the Patellofemoral Joint:
- Fractures of the Patella:
- Jumper's Knee:
- Lateral Retinacular Release
- Patella Alta
- Pathology
...

Physical Exam Radiographs ACL Anteromedial Instability Anterolateral Rotatory Instability Arcuate Ligament Complex Arthrofibrosis Arthroscopy of the Knee Arthrodesis Articular Cartilage Baker's Cyst Bipartite Patella Blood Supply Blount's Disease Bursitis Capsule Chondral Injuries of the Knee Chondromalacia Diff Dx Discoid Meniscus Dislocations of the Knee Extensor Mechanism Injuries of the Knee Flexion Contracture Genu Varum Hemarthrosis High Tibial Osteotomy Intercondylar Eminence Fracture Jumper's Knee Kinematics of the Knee Joint Lachman Exam Lateral Anatomy Lateral Collateral Ligament Lateral Retinacular Release Ligaments of Humphrey and Wrisberg Medial...